Publications by authors named "Hiroshi Yajima"

Article Synopsis
  • The study focused on analyzing narratives from breast cancer patients to identify various concerns using a natural language processing model called BERT.
  • Researchers labeled interview transcripts with five categories of concerns: "treatment," "physical," "psychological," "work/financial," and "family/friends."
  • The classifiers created from these labeled texts demonstrated varying precision levels, with high scores for "physical" and "work/financial," and lower scores for "treatment," indicating room for improvement through domain adaptation techniques.
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  • The Japan Gastroenterological Association released clinical guidelines for chronic diarrhea in 2023, detailing its definition, classification, and diagnostic methods.
  • The guidelines emphasize distinguishing between types of chronic diarrhea and recommend lifestyle and dietary changes as the first line of treatment, followed by probiotics and anti-diarrheals.
  • They also note that many other treatments lack sufficient evidence, indicating a need for future research to improve chronic diarrhea management globally.
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  • - The Japan Gastroenterological Association released the first version of clinical guidelines for chronic constipation in 2023, detailing its definition, classification, diagnostic criteria, and treatment options based on the latest evidence.
  • - Treatment begins by identifying whether constipation is secondary due to other diseases or medications, then assessing for motility disorders; initial management includes lifestyle changes and osmotic laxatives.
  • - The guidelines emphasize a structured approach to diagnosis and treatment, including flowcharts, and suggest that stimulant laxatives should be used sparingly while alternative therapies have less evidence.
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  • Adverse event (AE) management is essential for better anti-cancer treatment outcomes, but some AE signals might be missed during clinical visits, highlighting the need for seamless monitoring.
  • The study developed deep-learning models to analyze cancer patient blogs in Japanese, aiming to classify posts that mention AEs by severity to identify those requiring immediate intervention.
  • The T5 model outperformed others in accurately classifying AE severity, potentially enabling earlier detection of AEs and improving patients' quality of life.
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Adverse event (AE) management is important to improve anti-cancer treatment outcomes, but it is known that some AE signals can be missed during clinical visits. In particular, AEs that affect patients' activities of daily living (ADL) need careful monitoring as they may require immediate medical intervention. This study aimed to build deep-learning (DL) models for extracting signals of AEs limiting ADL from patients' narratives.

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Background: Patients with breast cancer have a variety of worries and need multifaceted information support. Their accumulated posts on social media contain rich descriptions of their daily worries concerning issues such as treatment, family, and finances. It is important to identify these issues to help patients with breast cancer to resolve their worries and obtain reliable information.

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Early detection and management of adverse drug reactions (ADRs) is crucial for improving patients' quality of life. Hand-foot syndrome (HFS) is one of the most problematic ADRs for cancer patients. Recently, an increasing number of patients post their daily experiences to internet community, for example in blogs, where potential ADR signals not captured through routine clinic visits can be described.

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  • The study is a retrospective cohort analysis aimed at developing a self-reported questionnaire to screen for low bone mineral density (BMD) in perimenopausal and postmenopausal women.
  • It reviewed the medical records of 198 women and identified key variables—age, BMI, lower back pain, height loss, and menopause—that effectively predict low BMD.
  • The scoring tool showed promising results with an area under the curve of 0.738, sensitivity of 82.8%, and specificity of 52%, indicating it could be a useful screening method for low BMD in this demographic.
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The development of anthropic activities during the 20th century increased the nutrient fluxes in freshwater ecosystems, leading to the eutrophication phenomenon that most often promotes harmful algal blooms (HABs). Recent years have witnessed the regular and massive development of some filamentous algae or cyanobacteria in Lake Geneva. Consequently, important blooms could result in detrimental impacts on economic issues and human health.

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Septic arthritis of the wrist is rare entity, especially; atypical mycobacterial infection of the wrist is extremely rare. We report a case of septic arthritis of the wrist caused by , which was successfully treated by radical debridement followed by wrist arthrodesis using vascularised fibular grafting.

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The periodontal ligament (PDL) is a connective tissue that attaches the tooth cementum to the alveolar bone and is derived from dental follicle cells (DFCs). The DFCs form fibroblasts, osteoblasts, cementoblasts, and PDL stem cells (PDLSCs). We previously reported homeobox transcription factor Six1 expression in mouse DFCs.

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Muscle regeneration is an important process for skeletal muscle growth and recovery. Repair of muscle damage is exquisitely programmed by cellular mechanisms inherent in myogenic stem cells, also known as muscle satellite cells. We demonstrated previously the involvement of homeobox transcription factors, SIX1, SIX4 and SIX5, in the coordinated proliferation and differentiation of isolated satellite cells in vitro.

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SIX1 homeodomain protein is one of the essential key regulators of sensory organ development. Six1-deficient mice lack the olfactory epithelium, vomeronasal organs, cochlea, vestibule and vestibuloacoustic ganglion, and also show poor neural differentiation in the distal part of the cranial ganglia. Simultaneous loss of both Six1 and Six4 leads to additional abnormalities such as small trigeminal ganglion and abnormal dorsal root ganglia (DRG).

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The aim of this study was to examine the clinicopathological characteristics of cases undergoing additional gastrectomy after endoscopic mucosal resection (EMR) for early gastric cancer (EGC) and the appropriate strategy for treating those after incomplete EMR. We studied 16 patients who underwent additional gastrectomy after EMR for EGC. The reasons for additional gastrectomy were positive horizontal margin (8 cases), indeterminate horizontal margin (2 cases), positive vertical margin (4 cases), submucosal invasion (7 cases), lymphatic invasion (4 cases), venous invasion (1 case), and local recurrence (2 cases, including overlapped cases).

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We present a case of post-traumatic osteonecrosis of the lunate after fracture of the distal radius. Post-traumatic osteonecrosis of the carpal lunate after a fracture of the distal radius has, to our knowledge, not been reported previously. We treated the patient with vascularised bone graft from the distal radius, with a satisfactory result.

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Background: Distal gastrectomy with Billroth-I reconstruction (DGBI) is the most commonly used treatment approach for gastric cancer patients in Japan. The aim of this study was to assess and elucidate the effect of different surgical DGBI techniques on postgastrectomy syndrome (PGS) using the Postgastrectomy Syndrome Assessment Scale-45 (PGSAS-45).

Methods: The newly created PGSAS-45 composed of 45 questions was used in this study.

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Background/aims: The aims of this study were to define CA19-9-producing gastric cancer and investigate its clinicopathological features.

Methodology: Twenty-three patients showing high preoperative serum CA19-9 levels (> or = 38 U/mL) were enrolled in this retrospective cohort study. The CA19-9 cut-off level was determined on the basis of receiver operating characteristic analysis of CA19-9 levels obtained from patients having survived for 3 years after surgery.

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Background: Various senses and sensory nerve architectures of animals have evolved during adaptation to exploit diverse environments. In craniates, the trunk sensory system has evolved from simple mechanosensory neurons inside the spinal cord (intramedullary), called Rohon-Beard (RB) cells, to multimodal sensory neurons of dorsal root ganglia (DRG) outside the spinal cord (extramedullary). The fish and amphibian trunk sensory systems switch from RB cells to DRG during development, while amniotes rely exclusively on the DRG system.

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We report isolated dislocation of the right pisiform bone dislocated distal and medial to the triquetrum bone in a young adult after a fall. Manipulation and closed reduction under intravenous regional anaesthesia resulted in full functional recovery and a good radiological outcome.

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We report a case of primary Ewing sarcoma of the proximal phalanx of the right middle finger in an 18-year-old boy. He was treated with neoadjuvant chemotherapy, followed by ray amputation. To restore maximum function, the index ray was transferred to the base of the third metacarpal bone and fixed with a plate.

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We treated a patient with skin and tendon defects of both hands as a result of injury by a heat press. There have been no reports of bilateral hand injuries being treated using simultaneous bilateral tendocutaneous flaps. In this case, we reconstructed the injured tissue using simultaneous bilateral radial forearm tendocutaneous flaps, with satisfactory results.

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Purpose: The aim of this study was to analyze the reasons and risk factors for intraoperative conversion from laparoscopic cholecystectomy to open cholecystectomy.

Methods: The study involved 407 patients in whom laparoscopic cholecystectomy was planned between January 1998 and July 2006. The patients were divided into two groups (the LC completed group and the conversion group), and the two groups were compared.

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Bilateral Kienböck's disease in pediatrics is extremely rare. We report a case of a 14-year-old boy with bilateral pediatric Kienböck's disease who was treated by temporary scaphotrapeziotrapezoidal joint fixation, with a good clinical result and radiographic results.

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The Six1 homeobox gene plays critical roles in vertebrate organogenesis. Mice deficient for Six1 show severe defects in organs such as skeletal muscle, kidney, thymus, sensory organs and ganglia derived from cranial placodes, and mutations in human SIX1 cause branchio-oto-renal syndrome, an autosomal dominant developmental disorder characterized by hearing loss and branchial defects. The present study was designed to identify enhancers responsible for the dynamic expression pattern of Six1 during mouse embryogenesis.

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We present a case of high-grade osteosarcoma in the proximal humerus in an 8-year-old boy. Massive tumor expansion required a S12345B shoulder girdle resection according to the system of the Musculoskeletal Tumor Society. After wide resection, only a small portion of the distal humerus and none of the rotator cuff muscles would be spared.

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